BlogErik Loyer : Eloquent interactive media

Go InSight: Composing a musical summation of every mission to Mars (Part 1)


image Two of my biggest interests—music and space—collided happily with the opportunity to join the official NASA Social media team covering the launch of the InSight mission, humanity’s latest robotic envoy to Mars. I think it’s going to take years for me to fully process just how rare this opportunity was, much of it occasioned by the fact that this was the very first interplanetary launch from the US West Coast at Vandenberg Air Force Base, only a few hours from where I live. Fortuitously, the news of my selection actually arrived on the same day I found out that my rhythmic storytelling tool Stepworks was a Webby Honoree (a very good day indeed!) and so, as I had pitched to the NASA Social team in my application, I immediately set about thinking how I could use Stepworks to compose a unique “micromusical” piece relating to the launch.

As I started poring through the official information made available about the mission by NASA, one of the things that jumped out at me immediately was a timeline of Mars exploration. Timelines are interesting to me compositionally because they are essentially data-driven stories which easily lend themselves to musical interpretation. The simple fact that only 40% of Mars missions have succeeded immediately brings home the often-repeated aphorism “space is hard,” and as a narrative I wanted the piece to reflect the challenges of space travel from an species-level perspective, superseding the nationalistic Cold War vantage point that kicked off the space race.

My first task was to get a sense of the narrative “shape” of the data I was working with (akin to a “spotting session” when scoring a film). I immediately noticed a clear “every other year” pattern evident in the groups of mission dates: 1960-1962-1964, 1969-1971-1973-1975, etc. At first I thought this rhythm was simply a result of the amount of time it took to prepare the missions, but after my time at Vandenberg my understanding is that it was primarily an expression of the orbital mechanics of Mars and Earth, as optimal launch windows between the two planets only arise every 26 months. As a result, the underlying meter of the piece is actually conditioned by the movements of the planets themselves—a wonderful thought.

Initially I began “sonifying” the launch timeline using months as my basic rhythmic unit not only to determine when notes would begin, but also when they would end, based on the relative duration of the missions. As mission success rates increased over time, I knew this would have the effect of “filling out” the piece with additional sustained notes, hopefully giving a nice build. Using months as the rhythmic basis had a profound impact on the piece, making it very sparse rhythmically (though still conforming roughly to the 26 month launch window cycle). To increase energy, I added a “monthly” pulse in the bass, with accents in January and July (the first and seventh beats), giving a 6/8 meter to the piece as a whole, set at a high 200 bpm tempo.

Harmonically, I took a programmatic approach, using A as the root with each contemporaneous mission coming moving up a third in the natural minor scale (with a few exceptions in octave placement as the missions started to pile up). As the monthly pulse sounded continuously on A, any launch occurring while no other Mars missions were active would be played on C (up a minor third). If yet another launch occurred while the first mission was still running, it would be represented by an E (up a major third), the next by a G, and so on. If, however, all missions ended before the next launch began, that next launch would drop back down to the original C. This also had the effect of building the harmonic range of the piece over time from unisons, to minor third intervals, to minor third triads, then on to sevenths, ninths, etc. as more successful missions began running simultaneously. This harmonic development seemed to fit the evolution of the space program from its nationalistic origins to the more collegial and collaborative efforts underway today.

Here’s the piece that resulted, covering about 60 years of Mars exploration in two minutes:

I feel like I hit a nice sweet spot with this piece between something that’s listenable while still clearly being data-driven in a way that actually gives you some real insight (pun intended) into the narrative shape of Mars exploration. The initial missions are staccato and syncopated, building to the successful landing of the two Viking missions in 1975 which gives us our first sustained interval. After that success, it’s almost as if the human race needs to catch its breath before moving further, with a few missions here and there gradually building to a massive chord as more and more successful Mars orbiters, landers, and rovers begin operating simultaneously and for longer durations, capped by the blip of the anticipated launch of InSight on May 5 (which happily, did indeed occur, and successfully too).

In the next post, I’ll break down my second attempt to make music from the timeline of Mars exploration, with a very different rhythmic and harmonic approach.

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